单项选择题
The three tasks shown have been completed in order to configure a naming method： Task 1： Installed on server and client： Oracle Net Services， TCP/IP， TCP/IP protocol adaptor Task 2： Started default listener on port 1521 Task 3： Added global database name to the listener.ora file.
Which naming method was configured？（）
A.host naming method
B.local naming method
C.directory naming method
D.external naming method
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